Open AccessQuadrature differential output six‐port rat‐race coupler
Author(s) -
Harada Michihiro,
Hayashi Hitoshi
Publication year - 2021
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12145
Subject(s) - rat race coupler , hybrid coupler , stub (electronics) , insertion loss , bandwidth (computing) , magic tee , port (circuit theory) , quadrature (astronomy) , ranging , transmission line , physics , optics , electrical engineering , electronic engineering , power dividers and directional couplers , engineering , telecommunications
This letter describes a design method for a six‐port rat race circuit to obtain quadrature differential waveforms from a single end. The proposed six‐port rat‐race coupler succeeded in low insertion loss and wide bandwidth by using a 1/2 wavelength transmission line and an open stub. Over the frequency range from 0.89 to 1.05 GHz, a prototype 0.96‐GHz‐band six‐port rat‐race coupler was confirmed to have a transmission loss of 7.03 ± 0.45 dB, a reflection loss and isolation of 15 dB or more, and a phase error of within ± 3.3 ○ .